Featured Silicon Pressure Sensor

Q: pressure sensor types

There are many types of pressure sensors. Such as resistance strain gauge pressure sensor. Semiconductor strain gauge pressure sensor. Piezoresistive pressure sensor. Inductive pressure sensor. Capacitive pressure sensor. Resonant pressure sensor, etc. At present, the widely used pressure sensors include: diffused silicon piezoresistive pressure sensors, ceramic piezoresistive pressure sensors, sputtering film pressure sensors, capacitive pressure sensors, and sapphire pressure sensors with high temperature resistance. But the most widely used is the piezoresistive pressure sensor, which has extremely low price, high precision and good linearity. Extended reading: What is an air pressure transducer?

Q: Diffused Silicon Piezoresistive Pressure Sensors

The piezoresistive chip of the piezoresistive pressure sensor is packaged in a shell, and the periphery is fixed to form a silicon cup structure. On the circular silicon diaphragm, four resistance strips with equal resistance value are made by the above-mentioned diffusion or ion implantation doping method. Put two of them in the range of compressive stress. The other two are fixed in the range of tensile stress. Together they form a Wheatstone bridge measurement circuit. Resistor strips are drawn from the bridge power supply terminal and output terminal. The above-mentioned structure is packaged by the manufacturing method of an integrated circuit to obtain a diffused silicon piezoresistive pressure sensor.

Q: capacitive pressure sensor

Capacitive pressure sensor is a pressure sensor that uses capacitive sensitive elements to convert the measured pressure into an electrical output that has a certain relationship with it. The characteristics are that the input energy is low, the dynamic response is high, the natural effect is small, and the environmental adaptability is good. It generally uses a circular metal film z or a metal-plated film as an electrode of the capacitor. When the film is deformed by pressure, the capacitance formed between the film and the fixed electrode changes. The output can be in a certain relationship with the voltage by measuring the circuit. electrical signal. Capacitive pressure sensors belong to the polar distance variable capacitive sensors. They can be divided into single capacitive pressure sensors and differential capacitive pressure sensors

Q: MEMS piezoresistive pressure sensor

Current MEMS pressure sensors include silicon piezoresistive pressure sensors and silicon capacitive pressure sensors. Both are microelectromechanical sensors produced on silicon wafers. The silicon piezoresistive pressure sensor uses high-precision semiconductor resistance strain gauges to form a Wheatstone bridge as a force-electricity conversion measurement circuit. It has high measurement accuracy, low power consumption and extremely low cost. Piezoresistive sensor for a Wheatstone bridge. If there is no pressure change, its output is zero and almost no power consumption. Capacitive pressure sensors use MEMS technology to create a grid-like shape on a silicon wafer. The upper and lower two transverse barriers become a group of capacitive pressure sensors. The upper transverse grille is displaced downward by pressure. Changed the spacing between the upper and lower transverse grids. It also changes the size of the capacitance between the plates, that is, △ pressure = △ capacitance. Extended reading: Industrial Pressure Transmitters|Buy from the manufacturer

Posted on May 24, 2019 by KimGuo11

A Silicon Pressure Sensor is a pressure transmitter widely used in industry. It uses diffused silicon or ceramic piezoresistive sensors as pressure detection elements. It has strong overload capacity, good stability, and strong anti-interference ability. It has extremely high accuracy and repeatability, and the measurement interface has good corrosion resistance.

RFQ

Silicon Pressure Sensor Benefits

Silicon Pressure Sensor has a large signal output. It provides great advantages for the back-end transmission and conditioning circuit. It has high resolution and high sensitivity.
It can be compensated twice. The sensitivity temperature coefficient and zero temperature coefficient of Silicon Pressure Sensor can be compensated. Even the finished core can be compensated twice.
Silicon Pressure Sensors are relatively cheap and cost-effective.
The Silicon Pressure Sensor is small and easy to install. It can be installed and used in narrow locations.
316L stainless steel mechatronic structure with good durability.
Integrated dedicated chip, few discrete components, good temperature characteristics.

Industrial Silicon Pressure Sensor Technical Parameters

Pressure Media	Fluids, Gas
Supply Voltage	-30℃~160-350℃， customized up to -300~850℃
Operating Range	(Gage/Absolute Pressure)–Max(0～60)MPa, Min(0～0.5)KPa
Operating Range	(Negative Pressure)—Max(-100KPa～), Min(-0.2～0.2 )KPa
Accuracy	±0.5%(25℃)
Over Pressure	200% full scale
Long Term Stability	<0.25%FS per year
Response	<100ｍs
Output Signal	(4～20)mA+HART protocol（Current two-wire/three-wire, HART protocol）, etc.
Temperature Range	-30℃~160-350℃, Customized up to -300~850℃
Temperature Effects	0.00015%FS/℃
Pressure Connection	G1/2 female or user specified
Electrical Connection	Waterproof Connector(M20*1.5)
Protection Class	IP65

Silicon Pressure Sensor Applications

Silicon Pressure Sensor Mainly used to measure the pressure of gas, liquid and other objects. The parameters are then converted into standard telecom signals.

The application scope of diffusion silicon pressure transmitter mainly has the following:

Petroleum/Petrochemical/Chemical
Matched with the throttling device, it provides accurate flow measurement and control.
Measures pressure and level in pipes and tanks.
Electricity/city gas/other company business
Places such as measurement require high stability and high precision.
Pulp and paper
It is used in places requiring chemical resistance, corrosion resistance, etc.
Steel/non-ferrous metals/ceramics
It is used for furnace pressure measurement and other places requiring high stability and high precision measurement.
For use where stable measurements are required under strictly controlled (temperature, humidity, etc.) conditions.
Machinery/Shipbuilding
It is used in places where stable measurement is required under high-precision conditions such as strict control of temperature and humidity.

Extended reading: Featured Diaphragm Seal Pressure Transmitters

There are many types of pressure sensors. Such as resistance strain gauge pressure sensor. Semiconductor strain gauge pressure sensor. Piezoresistive pressure sensor. Inductive pressure sensor. Capacitive pressure sensor. Resonant pressure sensor, etc.

At present, the widely used pressure sensors include: diffused silicon piezoresistive pressure sensors, ceramic piezoresistive pressure sensors, sputtering film pressure sensors, capacitive pressure sensors, and sapphire pressure sensors with high temperature resistance.

But the most widely used is the piezoresistive pressure sensor, which has extremely low price, high precision and good linearity.

Extended reading: What is an air pressure transducer?

When the semiconductor silicon material is subjected to force, the atomic lattice changes.
That is, the spacing of the lattice changes. Then the carrier mobility of the silicon material changes.
changes, and the concentration changes. The lateral distribution structure and longitudinal distribution of carriers are disturbed.
The distribution structure of the material eventually leads to a change in the resistivity of the material. The above is half of the
A detailed elaboration of the piezoresistive effect of conductor silicon materials.

A pressure sensor that is also widely used, that is, a resistance strain sensor. Compared with a piezoresistive pressure sensor, the working process or working principle between the two is essentially different.

Piezoresistive Effect of Semiconductor Silicon Piezoresistive Pressure Sensor and Strain Effect of Metal Strain Gauge
The difference between the two should be: the output power of the former, that is, the change of the resistance value mainly depends on the material.
The change of the resistivity of the material. The output power of the latter, that is, the change of the resistance value depends on
Changes in material geometry (strain.

The sensitivity of semiconductor silicon material is high, and its sensitivity is 50 to 100 times that of metal strain gauges.

In 1954, Smith devoted himself to researching the piezoresistive effect of semiconductor silicon material. At the same time, he used it to make pressure sensors.

The silicon pressure sensor researched in the early stage is similar to the semiconductor strain gauge. After development and research, the N-type silicon wafer is doped with P-type impurities by diffusion or ion implantation. The resistance bar is customized. It is matched behind the resistance bar Connect a suitable bridge circuit to make an integrated chip.

It is the same as the use of resistance strain gauges. The chip cannot be used independently to complete the measurement work. It also needs to be firmly attached to the elastic element to sense the change in the measured pressure.

Diffused silicon piezoresistive pressure sensor refers to a sensor made by using the above-mentioned chip as a sensitive element.

The piezoresistive chip of the piezoresistive pressure sensor is packaged in a shell, and the periphery is fixed to form a silicon cup structure.

On the circular silicon diaphragm, four resistance strips with equal resistance value are made by the above-mentioned diffusion or ion implantation doping method.

Put two of them in the range of compressive stress. The other two are fixed in the range of tensile stress. Together they form a Wheatstone bridge measurement circuit.

Resistor strips are drawn from the bridge power supply terminal and output terminal.

The above-mentioned structure is packaged by the manufacturing method of an integrated circuit to obtain a diffused silicon piezoresistive pressure sensor.

Capacitive pressure sensor is a pressure sensor that uses capacitive sensitive elements to convert the measured pressure into an electrical output that has a certain relationship with it. The characteristics are that the input energy is low, the dynamic response is high, the natural effect is small, and the environmental adaptability is good.

It generally uses a circular metal film z or a metal-plated film as an electrode of the capacitor. When the film is deformed by pressure, the capacitance formed between the film and the fixed electrode changes. The output can be in a certain relationship with the voltage by measuring the circuit. electrical signal.

Capacitive pressure sensors belong to the polar distance variable capacitive sensors. They can be divided into single capacitive pressure sensors and differential capacitive pressure sensors

Current MEMS pressure sensors include silicon piezoresistive pressure sensors and silicon capacitive pressure sensors. Both are microelectromechanical sensors produced on silicon wafers.

The silicon piezoresistive pressure sensor uses high-precision semiconductor resistance strain gauges to form a Wheatstone bridge as a force-electricity conversion measurement circuit. It has high measurement accuracy, low power consumption and extremely low cost. Piezoresistive sensor for a Wheatstone bridge. If there is no pressure change, its output is zero and almost no power consumption.

Capacitive pressure sensors use MEMS technology to create a grid-like shape on a silicon wafer. The upper and lower two transverse barriers become a group of capacitive pressure sensors. The upper transverse grille is displaced downward by pressure. Changed the spacing between the upper and lower transverse grids. It also changes the size of the capacitance between the plates, that is, △ pressure = △ capacitance.

Extended reading: Industrial Pressure Transmitters|Buy from the manufacturer

Beginner’s Guide for HART Protocol

Posted on May 23, 2019 by KimGuo11

RFQ

The HART protocol is the most trusted communication protocol in recent years. It combines the characteristics of analog systems and digital control systems.

Field instruments in process plants are beginning to be subject to more complex metrology regulations. Most new field instruments are now smart digital instruments. HART is widely used in process and instrumentation systems, such as smart HART pressure transmitters.

What is the HART protocol?

The full name of HART protocol is Highway Addressable Remote Transducer Protocol. This open standard for fieldbus communication was introduced by Fisher-Rosemount in the 1980s.

In order to solve the communication problem between industrial field intelligent instruments and control systems. The FSK (Frequency Shift Keying) frequency shift keying signal based on the Bell202 standard is used to superimpose an audio digital signal with an amplitude of 0.5mA on the traditional 4-20mA analog signal for two-way digital communication.

HART communication will not interfere with the analog signal transmitted to the control system. It ensures compatibility with existing analog systems. It is a transitional product in the process of transforming from analog systems to digital systems.

Benefits of HART protocol

Compatibility: HART protocol can be used to connect all types of field instruments, including temperature, liquid level, pressure, flow, analyzer, etc.

Reliability: HART protocol has full-duplex communication capability. The device can send and receive at the same time, ensuring the reliability of communication.

Ease of use: HART protocol can be transmitted through the existing 4-20mA signal. No additional hardware and cables are required, which is easy to use.

Working principle of HART protocol

HART protocol usually uses 4-20mA signal for two types of communication: analog signal and digital signal.

In analog signal, 4mA corresponds to the minimum value of instrument signal. 20mA corresponds to the maximum value of instrument signal.

In digital signal, the device can send digital instructions to the instrument. The instrument can also send complete measurement data and fault diagnosis information.

Digital signals can be separated and analyzed through HART system, which improves the performance of the system and reduces the cost of field instruments.

Application examples of HART protocol

Equipment adjustment: Through HART protocol, the parameters of field instruments can be adjusted remotely to achieve rapid adjustment of equipment.
Fault detection and diagnosis: HART protocol allows equipment to obtain the measurement data and fault diagnosis information of the instrument, which helps to find and solve equipment faults in time.
Valve control: According to the measurement data, the state of the inlet (outlet) valve can be controlled through HART protocol to achieve precise flow control.

If this article still can not explain the HART PROTOCOL for you, you can learn more about Highway Addressable Remote Transducer Protocol

HART protocol specification

As an open, compatible, stable and reliable communication protocol, HART protocol has been widely recognized and applied in the industrial field.

After decades of continuous evolution, multiple versions have been updated and improved. Each revision brings new technologies and functions while being compatible with previous versions to meet the ever-changing development needs of industrial automation.

The main functions and differences of the current mainstream versions HART 5, HART 6 and HART 7 are as follows:

①Protocols before HART 5:
Physical layer: RS485;
Link layer: Token master-slave question and answer mode;
Application layer: define some simple general commands.

②HART 5 version protocol:
Physical layer: analog current + FSK, 1200bps;
Link layer: token master-slave question and answer mode, adding a second master device and a slave device burst mode;
Application layer: further enriches general commands, ordinary commands, special commands, and short address range 0 to 15.

③HART 6 version protocol:
Physical layer: Added current C8PSK, 9600bps specification;
Application layer: Expanded command content, used extended user identification, added device cluster command, short address range 0~63.

④HART 7 version protocol:
Physical layer: Added 2.4G DSSS O-QPSK 10dBm 250kbps specification;
Link layer: Added time division multiple access (TDMA) link control mode;
Network layer: Added self-organization, multipath, mesh network specifications;
Application layer: Expanded device cluster command, added mesh network maintenance command.

Version	5	6	7
Analog loop check	√	√	√
Tag (8 characters)	√	√	√
Device calibration	√	√	√
Device configuration	√	√	√
Broadcast message (burst)	√	√	√
Multivariable communication (4)	√	√	√
Primary variable with status	√	√	√
Device status	√	√	√
Long tag (32 characters)		√	√
Locate device		√	√
Digital loop check		√	√
HART software lock		√	√
Multivariable status		√	√
Wireless			√
Extended manufacturer ID			√
Time stamp			√
Trending			√
Synchronous sampling			√
Enhanced broadcast message – exception reporting			√
Enhanced broadcast message – event notification			√

Featured HART Communicators and Smart Meters

**Emerson AMS TREX Device Communicator**

**Differential pressure(DP) level transmitter**

hART protocol vs modbus

Modbus protocol and HART protocol are two different industrial communication protocols, which have the following differences:

Modbus protocol is a request/response protocol. That is, a master device can send request information or write data to multiple slave devices. The slave device will reply or execute only when it receives the request from the master device. HART protocol is a hybrid protocol that combines analog and data signals. That is, a digital signal is superimposed on the 4-20mA analog signal to achieve two-way data transmission and remote control.

Modbus protocol supports multiple physical layers and transmission modes, such as RS232/RS485/RS422, TCP/IP, wireless, etc. HART protocol mainly uses RS485 physical layer, and can also use wireless physical layer, but does not support TCP/IP transmission mode.

Modbus protocol can transmit multiple variables and information. The data type is limited and the number of nodes is limited. HART protocol can only transmit one primary variable and some secondary variables, device status and configuration data, with rich data types and unlimited number of nodes.

Modbus protocol is an open, compatible, flexible, easy-to-use protocol with no security guarantee. The HART protocol is an open, compatible, stable and reliable protocol with certain security guarantees.

SMT3151 TGP Gauge Pressure Transmitter/Transducer

Posted on May 23, 2019 by KimGuo11

What is a gauge pressure transmitter?

Gauge Pressure Transmitter/Transducer is a commonly used pressure measurement process instrument in industry. The gauge pressure transmitter measures the pressure signal at the reference end of atmospheric pressure.

An industrial gauge pressure transmitter is commonly used to monitor the process pressure of liquid, gas, steam, etc.

Sino-Inst offers a variety of Gauge pressure transmitters for industrial pressure measurement. If you have any questions, please contact our sales engineers.

More Pressure Transmitters

Benefits of Gauge Pressure Transmitter

High accuracy: The pressure transmitter can perform high-accuracy measurements within the measurement range of 0~60MPa.
Excellent overpressure performance: Can withstand 2 times the pressure range.
Intelligent static pressure compensation and temperature compensation protect the transmitter from the influence of temperature, static pressure and overpressure, reducing errors.
LCD digital display with backlight
Built-in three-button quick operation and local adjustment function
Various anti-corrosion materials are available
Multi-faceted self-diagnosis function
Optional signals 0-10V, 4-20mA, RS485, HART protocol, etc.

Read more about: Common Units Of Pressure

Specifications of Gauge Pressure Transmitter

Use object:	Liquid, gas or steam
Measuring range	0-3.5～35kPa 0-10～100kPa 0-35～350kPa 0-0.1～1.0MPa 0-0.35～3.5MPa 0-1.0～10MPa 0-2.1～21MPa 0- 4.1～41Mpa 0- 6.0～60MPa
Output signal:	4-20mAdc. Output, superimposed HART protocol digital signal (two-wire system)
Power source:	External power supply 24V dc. Power supply range 12V ~ 45V
Installation in dangerous places	Flameproof ExdIIBT5Gb; (explosion-proof certificate no. :CE16.1163) Intrinsically safe ExiaIICT4/T5/T6Ga; （explosion-proof certificate no. : CE15.2354X）
Accuracy:	±0.1%, ±0.075%
Stability:	±0.2%/12 months of the maximum range
Temperature effect：	Including zero and range for maximum temperature error of ±0.2% / 20 ℃
Power supply impact:	Less than 0.005% / V of the output range.
Vibration effect:	In any axial direction, the frequency is 200Hz, and the error is ±0.05% / g of the maximum range.
Electronic circuit board work in:	– 40 ~ 85 ℃;
Sensitive components work in :	– 40 ~ 85 ℃;
Storage temperature :	– 40 ~ 85 ℃;
With digital display:	– 25 ~ 75 ℃ (run); – 40 ~ 85 ℃ (no damage);
Relative humidity:	0 ~ 95%
Overpressure limit:	2~5 times the maximum range of the pressure transmitter is not damaged.
Volume change:	Less than 0.16cm3
Damping:	The time constant is adjustable from 0.1 to 32.0s.
Startup time:	3s, no preheating required.

**Flush membrane pressure connection interface**

Extended reading: How to calibrate HART pressure transmitters

Common Industrial Applications of Gauge Pressure Transmitter

Gauge pressure transmitter is the most commonly used detection instrument in industrial process control, which is widely used in various automatic control systems. Such as aerospace, military industry, petrochemical, chemical industry, oil well, electricity, shipbuilding, building materials, pipelines and many other industries.

It is generally used to measure pressure or absolute pressure in environments where the medium temperature is not too high, the corrosiveness is not strong, the viscosity is not high, and it is not easy to crystallize.

If low temperature, high temperature, corrosive medium measurement is required. Please contact our engineers for customization!

Mechanical and plant engineering
Chemical industry
Medical technology
Food and beverage
Oil and gas industry
Packaging and paper industry
Pharmaceutical industry

Explosion Proof Pressure Transmitter for Hazardous locations

Gauge pressure transmitter working principle

SMT3151 TGP-Gauge Pressure Transmitter / Transducer is a diffusion silicon pressure transmitter. The working principle of the diffused silicon pressure sensor is based on the piezoresistive effect.

Using the principle of piezoresistive effect, the pressure of the measured medium directly acts on the diaphragm of the sensor (stainless steel or ceramic).

Make the diaphragm produce a slight displacement proportional to the pressure of the medium. To change the resistance value of the sensor. Use electronic circuits to detect this change. And convert and output a standard measurement signal corresponding to this pressure.

More about : Pressure transmitter Working Principle.

Difference between absolute, gauge, and differential pressure

Comparison of absolute, gauge and differential pressure

Absolute pressure

Absolute pressure is referred to as the vacuum of free space (zero pressure). In practice, absolute piezoresistive pressure sensors, measure the pressure relative to a high vacuum reference, sealed behind its sensing diaphragm.

The vacuum has to be negligible compared to the pressure to be measured. Sino-Instrument’s absolute pressure sensors, offer ranges from 1 bar or even 700 mbar as well as barometric pressure ranges.

Gauge pressure

Gauge pressure is measured relative to the ambient atmospheric. The average atmospheric at sea level is 1013.25 mbar. Changes of the atmospheric, due to weather conditions, or altitude influences the output of a gauge pressure sensor.

A gauge pressure higher than ambient pressure is referred to as positive pressure. If the measured pressure is below atmospheric, it is called negative or vacuum gauge pressure. In general, a vacuum is a volume of space that is essentially empty of matter.

According to its quality vacuum is divided into different ranges such as an e.g. low, high and ultra high vacuum.

Differential pressure

Differential pressure is the difference between any two process pressures p1 and p2. Differential pressure sensors must offer two separate pressure ports, with a tube or thread. Sino-Instrument’s amplified pressure sensors, are able to measure positive and negative pressure differences. i.e. p1>p2 and p1<p2.

These sensors are called bidirectional differential pressure sensors, with ranges of e.g. -1…+1.0 bar or -2.5…+2.5 mbar. In contrast, unidirectional differential pressure sensor only operate in the positive range (p1>p2). E.g. from 0…1.0 bar or 0…2.5 mbar. And the higher has to be applied to the pressure port defined as “high pressure”.

Gauge Pressure VS Absolute Pressure

Gauge pressure refers to pipeline pressure. It refers to the pressure measured with pressure gauges, vacuum gauges, U-shaped tubes and other instruments, also called relative pressure). “Gauge pressure” starts from atmospheric pressure.
The pressure directly acting on the surface of the container or object is called “absolute pressure”. The absolute pressure value starts with absolute vacuum.
Absolute pressure actually refers to the gauge pressure plus the local atmospheric pressure (generally a standard atmospheric pressure can be 101.3Kpa).

Absolute pressure = gauge pressure + one atmosphere
If the unit is MPa, absolute pressure = gauge pressure + 0.1MPa

Transmitters can convert physical signals into electrical signals.
For example, our pressure transmitter can convert pressure signals into 4-20mA. Liquid level transmitter can convert liquid level signals into 4-20mA.

Gauges are generally mechanical. There is no output of electrical signals. For example, pressure gauges and liquid level gauges. The measurement results can be measured and read intuitively.

When selecting a pressure transmitter, the concept of pressure type is involved: absolute pressure, gauge pressure, negative pressure and differential pressure.

Absolute pressure transmitter measures the absolute pressure of the medium in the equipment. Its reference pressure is an absolute value of 0. It has nothing to do with atmospheric pressure. Therefore, there will be a vacuum sealed cavity on the low-pressure side of the pressure core.

Gauge pressure transmitter measures the pressure based on atmospheric pressure. One side of the pressure transmitter is connected to the atmosphere, and the other side is connected to the measured pressure, so the reference pressure side is open to the atmosphere. It is generally used to measure the liquid level of pipelines and non-pressure tanks.

If you pay close attention to the outer shell of some gauge pressure transmitters, it is not difficult to find some small holes on it. These vents are reserved to keep the reference side connected to the atmosphere.

More Featured Pressure Transmitters and Pressure Measurement Solutions

**SI-512H High Temperature Pressure Sensor**

**SI-706 Combined Pressure and Temperature Sensor-Dual function**

We at Sino-Inst manufacture and supply various types of gauge pressure transmitters for various industries. Customized production is available based on your measurement requirements, including pressure range, temperature, accuracy, signal output, mounting thread, material, etc.

If you need to purchase a gauge pressure transmitter, or have any technical questions, please feel free to contact us.

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KimGuo11

drurylandetheatre.com

HART 375 Field Communicator

Posted on May 23, 2019 by KimGuo11

HART 375 Field Communicator is a handheld communicator that supports HART protocol devices. It can configure, manage and maintain all devices that comply with the HART protocol.

This intelligent handheld operator can communicate with 11513351, 3851, 1851, 3051, EJA and other HART protocol instruments. It is fully compatible with various intelligent pressure transmitters produced in China.

RFQ

Features of HART 375 Field Communicator

Easy operation: Large display screen (4 lines, 18 characters per line);
Online monitoring and communication: During communication, the modulated signal will not interrupt the 4~20mA DC signal;
Can be used with instruments using the HART communication protocol: Used with all instruments using the HART communication protocol;
Information self-diagnosis/protection function: self-check function, formatting password protection, low voltage alarm display;

Applications

Fully supports all standard HART communications;
Siemens intelligent pressure transmitter;
Lanlian LSⅢ intelligent pressure transmitter;
3051 intelligent pressure transmitter;
1151, 3151 intelligent pressure transmitter;
Fairbus CDS-3151 intelligent pressure transmitter;
Yokogawa EJA intelligent pressure transmitter (supports new version)
Russian METRAN-49, 100 intelligent pressure transmitter
Rosemount 1151, 3051 intelligent pressure transmitter (supports new version)

Function

HART intelligent devices can be tested, diagnosed and inspected in production;
HART intelligent devices can be configured, calibrated, diagnosed, maintained and monitored during field operation;
Obtain manufacturer information of HART instruments on site;
Understand the working status and fault information of HART instruments;
Read the output current and process variables of the instrument;
Obtain parameters and output values of related sensors;

Specifications of 375 HART Communicator

Microprocessor:	80MHZ
RAM:	32M
Built-in memory:	32M
System card:	128M or higher
Expansion module:	32M
Protection:	IP51 (front)
Working environment:	-10～50 degrees Celsius
Anti-vibration:	1m landing on concrete floor is no problem
Weight:	0.9KG, including battery
Humidity:	0～95% (no condensation)
Display:	1/4VGA (240*320 pixels)
Storage:	-20～55 degrees Celsius (with battery) -20～60 degrees Celsius (without battery)
Keyboard:	25 keys, 4 operation keys, 12 letter keys, 4 shoulders, 4 function keys and power key
Battery:	Rechargeable NiMH battery, can be used for 10 hours, 85～240vac charging
Dimensions:	228mm×98mm×60mm

Working Principle of HART 375 communicator

HART 375 Field Communicator is a portable terminal that is used with instruments that use the HART communication protocol to set, change and display them. It can monitor input/output values and self-diagnosis results. Set constant current output and zero adjustment.

When the system is started or maintained, just connect the HART375 HART communicator to the 4~20mA communication signal line and it can be used.

With the Video below, you will know more about: The Working Principle of HART 375 communicator, and what is HART Protocol?

HART 375 Field Communicator Vs HART 475 Field Communicator

Rosemount HART375 and HART475 handheld operators have been discontinued. Sino-Inst’s HART375 and HART475 are affordable.

Functional difference

The range of supported products is different. In fact, the functions and supported range of HART375 and HART475 are similar. In terms of function, the HART protocol library of 475 is continuously upgraded, so it supports the widest range of products.

Speed difference

It is reflected in the convenience of operation. The data operation processor of HART475 is much faster than that of HART375.

Read More about: HART475 Field Communicator

Now, Emerson stopped all the services of the 375.
You can consider buying a new version-Emerson AMS TREX Device Communicator.

Our 375 Communicator is suitable for most transmitters with HART protocol. For example:

**Diffused silicon Gauge Pressure Transmitter**

**Capacitive Gauge Pressure Transmitter**

**Explosion-proof Pressure Transmitter**

**High-Temperature Pressure Transmitter**

If you need the datasheet, price, or more information about HART 375 Field Communicator,

Just Contact Us.

Sino-Inst offers over 100 Level Sensors (like the ultrasonic level transmitter), pressure transducers (like the Low-Pressure Transducer, capacitive pressure transducer), Flowmeters ( like the Portable Ultrasonic Flowmeter, Magnetic flow meters ).

About 50% of these are Submersible Level Sensors, 40% are water Sanitary Pressure Transmitter, and 40% are 4-20mA/ Voltage Pressure Transducer . A wide variety of Industrial Pressure Transmitters options are available to you, such as free samples, paid samples.

Sino-Inst is a globally recognized supplier and manufacturer of wireless pressure transmitters instrumentation, located in China. We sells through a mature distribution network that reaches all 50 states and 30 countries worldwide.

HART 375 products are most popular in Domestic Market, Southeast Asia, and Mid East. You can ensure product safety by selecting from certified suppliers, with ISO9001, ISO14001 certification.

Request a Quote

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KimGuo11

drurylandetheatre.com

HART475 Field Communicator

Posted on May 22, 2019 by KimGuo11

RFQ

The HART475 Field Communicator is a handheld communicator that supports HART protocol devices. It is mainly used for configuring, managing, maintaining, adjusting HART intelligent instruments in industrial sites and monitoring instruments during operation.

The HART475 Field Communicator can communicate with 1151, 3051, EJA, ABB, and other HART protocol instruments. It is fully compatible with various intelligent pressure (temperature) transmitters, and can also communicate with electromagnetic flowmeters, V-cone flowmeters, target flowmeters, vortex flowmeters, and other flowmeters that support HART protocol.

Features of HART475 Field Communicator

During online monitoring and communication, the modulated signal will not interrupt the 4~20mA DC signal;
The HART communicator can be shared with instruments using HART communication protocol and can be used with all instruments using HART communication protocol;
Easy to operate Large display screen, users can see at a glance, easy to set and change;
Information self-diagnosis/protection function;
Full-featured communication: communication supports flow meters, temperature meters, and transmitters carrying HART protocol;
Large-screen display: the display interface is larger and clearer, using LCD screen;
Production testing, diagnosis and inspection of HART smart devices;
It can configure, calibrate, diagnose, maintain and monitor HART intelligent equipment in field operation;
Obtain the manufacturer information of the field HART instrument;
Understand the working status and fault information of the HART instrument;
Read the output current and process variables of the instrument;
Obtain the parameters and output values of related sensors;
Self-checking function;
format password protection;
Low voltage alarm display;
Standard technical specifications;

What’s in the Box

The device is equipped with:
A manual operator
A Battery
A Pack
A charger
A communication cable
A 250-ohm resistor

Configuration parameters

Product name:	HART475 English Communicator (Field Communicator)
Protocol version:	HART475
Compatible Versions:	HART275/HART375/HART475
Communication object:	It can communicate with 1151,3051, EJA, ABB, and HART protocol imported instruments in terms of flow and various smart transmitters made in China with HART protocol
Accuracy class:	0.05%F.S
Battery storage:	-20~50℃
Operating temperature:	-10~50℃
Relative humidity:	0~95%RH (no condensation)
Product Weight:	0.48Kg
Dimensions:	23013045mm
Power supply:	Built-in rechargeable battery
Packing:	With carrying case
Accessories:	Charger,test lead,alligator clip,2500 resistor

More Featured Products can work with HART Communicators:

**Remote Seal Differential Pressure Transmitter**

**ULT-100 Explosion-proofUltrasonic Level Indicator**

**Low temperature Turbine Flowmeter-Liquid Nitrogen Flow Meter**

Now, Emerson stopped all the services of the 375. You can consider buying a new version-Emerson AMS TREX Device Communicator.

If you need the datasheet, price, or more information about HART 375 Field Communicator,

Just Contact Us.

Sino-Inst offers over 100 Level Sensors (like the ultrasonic level transmitter), pressure transducers (like the Low-Pressure Transducer ), and Flowmeters (like the verabar and annular).

About 50% of these are Submersible Level Sensors, 40% are water Sanitary Pressure Transmitters, and 40% are 4-20mA/ Voltage Pressure Transducer.

A wide variety of Industrial Pressure Transmitters options are available to you, such as free samples, and paid samples.

Sino-Inst sells through a mature distribution network that reaches all 50 states and 30 countries worldwide. HART475 Field Communicators are most popular in the Domestic Market, Southeast Asia, and Mid East. You can ensure product safety by selecting from certified suppliers, with ISO9001, ISO14001 certification.

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KimGuo11

drurylandetheatre.com

Professional Partner for Measure & Control

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